Laser-Rayleigh Imaging of DME Sprays in an Optically Accessible DI Diesel Truck Engine
(2001) SAE World Congress, 2001- Abstract
- Laser-Rayleigh imaging has been employed to measure the relative fuel concentration in the gaseous jet region of DME sprays. The measurements were performed in an optically accessible diesel truck engine equipped with a common rail injection system. A one-hole nozzle was used to guarantee that the recorded pressure history was associated with the heat release in the imaged spray. To compensate for the low compression ratio in the modified engine the inlet air was preheated. Spray development was studied for two levels of preheating, from the start of injection to the point where all fuel was consumed. The results indicate that there is a strong correlation between the amount of unburned fuel present in the cylinder and the rate of heat... (More)
- Laser-Rayleigh imaging has been employed to measure the relative fuel concentration in the gaseous jet region of DME sprays. The measurements were performed in an optically accessible diesel truck engine equipped with a common rail injection system. A one-hole nozzle was used to guarantee that the recorded pressure history was associated with the heat release in the imaged spray. To compensate for the low compression ratio in the modified engine the inlet air was preheated. Spray development was studied for two levels of preheating, from the start of injection to the point where all fuel was consumed. The results indicate that there is a strong correlation between the amount of unburned fuel present in the cylinder and the rate of heat release at a given time. The combustion can not be described as purely premixed or purely mixing-controlled at any time, but always has an element of both. After all fuel appears to have vanished there is still an extended period of heat release. This indicates a rich combustion yielding combustible products. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4935735
- author
- Andersson, Öivind LU ; Collin, Robert LU ; Aldén, Marcus LU and Egnell, Rolf LU
- organization
- publishing date
- 2001
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- SAE Technical Paper 2001-01-0915
- pages
- 12 pages
- publisher
- Society of Automotive Engineers
- conference name
- SAE World Congress, 2001
- conference location
- Detroit, MI, United States
- conference dates
- 2001-03-05 - 2001-03-08
- external identifiers
-
- scopus:85072470459
- DOI
- 10.4271/2001-01-0915
- language
- English
- LU publication?
- yes
- id
- 99e9640e-fa8d-4c1a-ad9d-595e9be38b5a (old id 4935735)
- date added to LUP
- 2016-04-04 12:05:09
- date last changed
- 2025-04-04 15:23:04
@inproceedings{99e9640e-fa8d-4c1a-ad9d-595e9be38b5a,
abstract = {{Laser-Rayleigh imaging has been employed to measure the relative fuel concentration in the gaseous jet region of DME sprays. The measurements were performed in an optically accessible diesel truck engine equipped with a common rail injection system. A one-hole nozzle was used to guarantee that the recorded pressure history was associated with the heat release in the imaged spray. To compensate for the low compression ratio in the modified engine the inlet air was preheated. Spray development was studied for two levels of preheating, from the start of injection to the point where all fuel was consumed. The results indicate that there is a strong correlation between the amount of unburned fuel present in the cylinder and the rate of heat release at a given time. The combustion can not be described as purely premixed or purely mixing-controlled at any time, but always has an element of both. After all fuel appears to have vanished there is still an extended period of heat release. This indicates a rich combustion yielding combustible products.}},
author = {{Andersson, Öivind and Collin, Robert and Aldén, Marcus and Egnell, Rolf}},
booktitle = {{SAE Technical Paper 2001-01-0915}},
language = {{eng}},
publisher = {{Society of Automotive Engineers}},
title = {{Laser-Rayleigh Imaging of DME Sprays in an Optically Accessible DI Diesel Truck Engine}},
url = {{http://dx.doi.org/10.4271/2001-01-0915}},
doi = {{10.4271/2001-01-0915}},
year = {{2001}},
}